I have never personally used e clips, but I have been told that some of the early cars used them. The e clip does away with the problem of getting the C clip on backwards.
The chain itself RARELY if ever fails anyway. What fails is a rail or a tensioner that leads to binding that breaks the chain.
Although I hesitate to suggest what you do with such a critical subsystem in YOUR car, I would personally feel comfortable using e clips if the car were mine as long as there is nothing that comes near those e clips as the chain cycles. I would worry much, MUCH more about the condition of the rails and tensioner, particularly in a V8, than I would about the type of closing link used on the chain.